Model: Corvette ZR-1
I realized today that when I replaced my evaporator, I inadvertently installed one for a 94-95 model, which used R-134a. The core physically fit into the housing, but required a tiny modification to the plastic. I figured it was just one of those aftermarket parts issues, but I now realize there's a separate part for 90-93, which used R12. Probably a stupid question, but is there likely to be any problem with system performance in this case?
Edited: Tue May 24, 2011 at 10:19 PM by vettemed
All r-12 evaps, lines, hoses, and condensers used English threads
All 134a evaps, lines, hoses, and condensers use Metric threads.
Changeover for Corvette was 94 MY.
Metric threaded connections have a line cut in the nut or in the base of thread
So do you foresee an issue?
The number one A/C diagnostic tool there is- is to know how much refrigerant is in the system- this can only be done by recovering and weighing the refrigerant!!
Just a thought.... 65% of A/C failures in my 3200 car diagnostic database (GM vehicles) are due to loss of refrigerant due to a leak......
OK, thanks. This aftermarket evap must have been an R12, but used the later design, as the threads were without question the correct type.
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